Reborn, I Use Psychology to Crush Scumbags and Treat the Unhinged

In her previous life, she was manipulated by a scumbag, drained by her family, and betrayed by her best friend. Even the obsessive, unstable male lead who had silently protected her died for her. Reborn, she awakens a top-tier talent for psychology and can see right through people at a glance. She takes down the awful ones, crushes the scumbag, and, along the way... slowly heals the obsessive male lead who has never known love.